I have a set of #3998920 heads 1.94/1.5 valves 76cc.They were on a 4bolt with a medium cam.Some pistons have scuffing on the sides so I believe I should change them but to what.I want about 10-1.This engine is not my final but I want to fix it right so I can sell it honestly.I would do a valve job to be on the safe side.Any suggestions.
also are these heads #3998920 any good

just fix and sell. use the stock heads, w/ flat tops you'll get 9.1 or 9.2 and can run regular and prolly sell it faster. go to www.mortec.com to check out those heads. you prolly wont learn nothin there

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